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1. The gills of this insect nymph are located inside a special chamber (rectum) within its abdomen. The nymph breathes by drawing water in and out of its hind end.
A.
B.
2. This decapod is omnivorous, feeding upon vegetation or preying upon snails and other macroinvertebrates and small fish. It has two defense mechanisms. It has large claws on its first pair of legs for pinching. Also, it has expendable legs. When this creature is attacked, muscles in the walking legs may contract at creases and may break off. The missing legs regenerate with molt.
3. This aquatic insect has long oar-like hind legs used for swimming and feeds by inserting its beak into its prey and sucking out its bodily fluids.
4. This insect undergoes an incomplete metamorphosis. This benthic macroinvertebrate is fairly sensitive to changes in the ecological integrity of a body of water and serves as one of the indicator organisms observed by participants in the Illinois RiverWatch monitoring project.
5. This invertebrate must remain moist. To prevent desiccation, the organism produces a protective coat of mucus which also aids in travel as it moves by rhythmic waves of muscular contractions, leaving a slime trail behind.